Yasuji Ohtsuka

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for producing light transmitting article of synthetic resin
- Patent number 4,689,000
- Issue date Aug 25, 1987
- Nippon Sheet Glass Co. Ltd.
- Maeda Kouichi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method for producing light transmitting article of synthetic resin
- Patent number 4,587,065
- Issue date May 6, 1986
- Nippon Sheet Glass Co., Ltd.
- Maeda Kouichi
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Process for producing light-transmitting element of synthetic resin
- Patent number 4,521,351
- Issue date Jun 4, 1985
- Nippon Sheet Glass Co., Ltd.
- Yasuji Ohtsuka
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL